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#21919 closed defect (fixed)

NPE: Cannot invoke "java.awt.image.BufferedImage.getGraphics()" because "this.disabledImgCache" is null

Reported by:	anonymous	Owned by:	taylor.smock
Priority:	normal	Milestone:	22.03
Component:	Core mappaint	Version:
Keywords:	template_report	Cc:

Description

What steps will reproduce the problem?

What is the expected result?

What happens instead?

Please provide any additional information below. Attach a screenshot if possible.

Revision:18387
Build-Date:2022-03-07 09:13:43

Identification: JOSM/1.5 (18387 en_GB) Windows 10 64-Bit
OS Build number: Windows 10 Home 2009 (19043)
Memory Usage: 718 MB / 3036 MB (341 MB allocated, but free)
Java version: 17.0.2+8-LTS, Azul Systems, Inc., OpenJDK 64-Bit Server VM
Look and Feel: com.sun.java.swing.plaf.windows.WindowsLookAndFeel
Screen: \Display0 1920×1080 (scaling 1.25×1.25)
Maximum Screen Size: 1920×1080
Best cursor sizes: 16×16→32×32, 32×32→32×32
System property file.encoding: Cp1252
System property sun.jnu.encoding: Cp1252
Locale info: en_GB
Numbers with default locale: 1234567890 -> 1234567890
VM arguments: [-Djpackage.app-version=1.5.18387, --add-modules=java.scripting,java.sql,javafx.controls,javafx.media,javafx.swing,javafx.web, --add-exports=java.base/sun.security.action=ALL-UNNAMED, --add-exports=java.desktop/com.sun.imageio.plugins.jpeg=ALL-UNNAMED, --add-exports=java.desktop/com.sun.imageio.spi=ALL-UNNAMED, --add-opens=java.base/java.lang=ALL-UNNAMED, --add-opens=java.base/java.nio=ALL-UNNAMED, --add-opens=java.base/jdk.internal.loader=ALL-UNNAMED, --add-opens=java.base/jdk.internal.ref=ALL-UNNAMED, --add-opens=java.desktop/javax.imageio.spi=ALL-UNNAMED, --add-opens=java.desktop/javax.swing.text.html=ALL-UNNAMED, --add-opens=java.prefs/java.util.prefs=ALL-UNNAMED, -Djpackage.app-path=%UserProfile%\AppData\Local\JOSM\JOSM.exe]

Plugins:
+ FastDraw (35893)
+ alignways (35896)
+ buildings_tools (35916)
+ merge-overlap (35893)

Map paint styles:
+ https://josm.openstreetmap.de/josmfile?page=Styles/MappingAccessibility&zip=1

Last errors/warnings:
- 00000.726 W: extended font config - overriding 'filename.Myanmar_Text=mmrtext.ttf' with 'MMRTEXT.TTF'
- 00000.729 W: extended font config - overriding 'filename.Mongolian_Baiti=monbaiti.ttf' with 'MONBAITI.TTF'
- 00001.581 E: java.security.KeyStoreException: Windows-ROOT not found. Cause: java.security.NoSuchAlgorithmException: Windows-ROOT KeyStore not available
- 00583.225 W: java.net.SocketException: Unexpected end of file from server. Cause: java.net.SocketException: Unexpected end of file from server
- 00583.387 E: org.openstreetmap.josm.io.OsmTransferException: java.net.SocketException: Unexpected end of file from server. Cause: java.net.SocketException: Unexpected end of file from server. Cause: java.net.SocketException: Unexpected end of file from server
- 00583.402 E: Network exception - <html>Failed to open a connection to the remote server<br>'https://api.openstreetmap.org/api/0.6/'.<br>Please check your internet connection.</html>
- 00595.269 E: Handled by bug report queue: java.lang.NullPointerException: Cannot invoke "java.awt.image.BufferedImage.getGraphics()" because "this.disabledImgCache" is null



=== REPORTED CRASH DATA ===
StyledMapRenderer#paintRecord:
 - record: StyleRecord [style=NodeElement{z_idx=[4.0/0.0/0.0]  icon=[https://github.com/LorenzoStucchi/accessibility_JOSM_preset/raw/master/symbols/kerb_lime.png] mapImageAngle=[0.0rad]}, osm={Node id=9343343056 version=2 MVT lat=45.443483003571295,lon=9.19895727621095}, flags=0]

BugReportExceptionHandler#handleException:
No data collected.

Warning issued by: BugReportExceptionHandler#handleException

=== STACK TRACE ===
Thread: AWT-EventQueue-0 (22) of main
java.lang.NullPointerException: Cannot invoke "java.awt.image.BufferedImage.getGraphics()" because "this.disabledImgCache" is null
	at org.openstreetmap.josm.gui.mappaint.styleelement.MapImage.getDisabled(MapImage.java:147)
	at org.openstreetmap.josm.gui.mappaint.styleelement.MapImage.getImage(MapImage.java:113)
	at org.openstreetmap.josm.data.osm.visitor.paint.StyledMapRenderer.drawIcon(StyledMapRenderer.java:853)
	at org.openstreetmap.josm.data.osm.visitor.paint.StyledMapRenderer.drawNodeIcon(StyledMapRenderer.java:798)
	at org.openstreetmap.josm.gui.mappaint.styleelement.NodeElement.paintPrimitive(NodeElement.java:260)
	at org.openstreetmap.josm.data.osm.visitor.paint.StyledMapRenderer$StyleRecord.paintPrimitive(StyledMapRenderer.java:227)
	at org.openstreetmap.josm.data.osm.visitor.paint.StyledMapRenderer.paintRecord(StyledMapRenderer.java:1714)
	at org.openstreetmap.josm.data.osm.visitor.paint.StyledMapRenderer.paintWithLock(StyledMapRenderer.java:1696)
	at org.openstreetmap.josm.data.osm.visitor.paint.StyledMapRenderer.render(StyledMapRenderer.java:1645)
	at org.openstreetmap.josm.gui.layer.OsmDataLayer.paint(OsmDataLayer.java:543)
	at org.openstreetmap.josm.gui.layer.AbstractMapViewPaintable$CompatibilityModeLayerPainter.paint(AbstractMapViewPaintable.java:27)
	at org.openstreetmap.josm.gui.MapView.paintLayer(MapView.java:469)
	at org.openstreetmap.josm.gui.MapView.drawMapContent(MapView.java:584)
	at org.openstreetmap.josm.gui.MapView.paint(MapView.java:491)
	at java.desktop/javax.swing.JComponent.paintChildren(Unknown Source)
	at java.desktop/javax.swing.JComponent.paint(Unknown Source)
	at java.desktop/javax.swing.JComponent.paintToOffscreen(Unknown Source)
	at java.desktop/javax.swing.RepaintManager$PaintManager.paintDoubleBufferedFPScales(Unknown Source)
	at java.desktop/javax.swing.RepaintManager$PaintManager.paintDoubleBuffered(Unknown Source)
	at java.desktop/javax.swing.RepaintManager$PaintManager.paint(Unknown Source)
	at java.desktop/javax.swing.RepaintManager.paint(Unknown Source)
	at java.desktop/javax.swing.JComponent._paintImmediately(Unknown Source)
	at java.desktop/javax.swing.JComponent.paintImmediately(Unknown Source)
	at java.desktop/javax.swing.RepaintManager$4.run(Unknown Source)
	at java.desktop/javax.swing.RepaintManager$4.run(Unknown Source)
	at java.base/java.security.AccessController.doPrivileged(Unknown Source)
	at java.base/java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(Unknown Source)
	at java.desktop/javax.swing.RepaintManager.paintDirtyRegions(Unknown Source)
	at java.desktop/javax.swing.RepaintManager.paintDirtyRegions(Unknown Source)
	at java.desktop/javax.swing.RepaintManager.prePaintDirtyRegions(Unknown Source)
	at java.desktop/javax.swing.RepaintManager$ProcessingRunnable.run(Unknown Source)
	at java.desktop/java.awt.event.InvocationEvent.dispatch(Unknown Source)
	at java.desktop/java.awt.EventQueue.dispatchEventImpl(Unknown Source)
	at java.desktop/java.awt.EventQueue$4.run(Unknown Source)
	at java.desktop/java.awt.EventQueue$4.run(Unknown Source)
	at java.base/java.security.AccessController.doPrivileged(Unknown Source)
	at java.base/java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(Unknown Source)
	at java.desktop/java.awt.EventQueue.dispatchEvent(Unknown Source)
	at java.desktop/java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
	at java.desktop/java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
	at java.desktop/java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
	at java.desktop/java.awt.WaitDispatchSupport$2.run(Unknown Source)
	at java.desktop/java.awt.WaitDispatchSupport$4.run(Unknown Source)
	at java.desktop/java.awt.WaitDispatchSupport$4.run(Unknown Source)
	at java.base/java.security.AccessController.doPrivileged(Unknown Source)
	at java.desktop/java.awt.WaitDispatchSupport.enter(Unknown Source)
	at java.desktop/java.awt.Dialog.show(Unknown Source)
	at java.desktop/java.awt.Component.show(Unknown Source)
	at java.desktop/java.awt.Component.setVisible(Unknown Source)
	at java.desktop/java.awt.Window.setVisible(Unknown Source)
	at java.desktop/java.awt.Dialog.setVisible(Unknown Source)
	at org.openstreetmap.josm.gui.progress.swing.PleaseWaitProgressMonitor.lambda$doBeginTask$3(PleaseWaitProgressMonitor.java:255)
	at org.openstreetmap.josm.gui.progress.swing.PleaseWaitProgressMonitor.lambda$doInEDT$0(PleaseWaitProgressMonitor.java:113)
	at java.desktop/java.awt.event.InvocationEvent.dispatch(Unknown Source)
	at java.desktop/java.awt.EventQueue.dispatchEventImpl(Unknown Source)
	at java.desktop/java.awt.EventQueue$4.run(Unknown Source)
	at java.desktop/java.awt.EventQueue$4.run(Unknown Source)
	at java.base/java.security.AccessController.doPrivileged(Unknown Source)
	at java.base/java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(Unknown Source)
	at java.desktop/java.awt.EventQueue.dispatchEvent(Unknown Source)
	at java.desktop/java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
	at java.desktop/java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
	at java.desktop/java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
	at java.desktop/java.awt.EventDispatchThread.pumpEvents(Unknown Source)
	at java.desktop/java.awt.EventDispatchThread.pumpEvents(Unknown Source)
	at java.desktop/java.awt.EventDispatchThread.run(Unknown Source)

Attachments (0)

Change History (4)

comment:1 by skyper, 3 years ago

Component:	Core → Core mappaint
Summary:	Reporting bug → NPE: Cannot invoke "java.awt.image.BufferedImage.getGraphics()" because "this.disabledImgCache" is null

comment:2 by taylor.smock, 3 years ago

Owner:	changed from team to taylor.smock
Status:	new → assigned

This looks like a race condition. Adding synchronize to where we set the disabledImgCache variable in getDisabled should fix the problem. I'll do some testing to make certain that it doesn't cause any other issues, but I don't foresee any, except maybe some very brief UI blocking if the image finished loading prior to creating the disabledImgCache. This probably won't happen since I have it set up to enter a synchronized block immediately after the getImage call.

comment:3 by taylor.smock, 3 years ago

Resolution:	→ fixed
Status:	assigned → closed

In 18388/josm:

fix #21919: NPE in MapImage due to a race condition

This adds a synchronize block where disabledImgCache is calculated.
The new synchronize block will vie for the same lock as that in loadImage.
There should not be any significant UI penalty from this, as the loadImage
synchronized block does not depend upon anything particularly expensive, like
a network call. It also helps that almost all the time where both blocks will
be in contention, the new synchronize block will win.

comment:4 by taylor.smock, 3 years ago

Milestone:	→ 22.03

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